How to Setup a Cavitation Plate

(Adapted from a post by PTC on the Performance Boats Forums)

Starting from scratch on flats the basic setup is from "0" or neutral position. This is when your plates without any force applied either way have no flex in them coming off the back of your boat.

Before starting - Your entire cav plate should be off the end of your trailer so it does not hinder the movement of it up or down. Loosen the springs and clamp bar on the cav rod, loosen the stop on the cav rod.

Adjust the position of your pedals first like this. The downpedal should be listing rearward towards the drivers seat. So you can get as much throw from it as necessary. The up pedal will lean forward a bit, no big deal.

Now you can disconnect the turnbuckles from the cav plate pad end. just remove the pin holding it there. Leave them connected to the upper rotating rod assembly. When they are all disconnected this is your plates neutral position to the flat bottom.

Adjust the turnbuckles now to connect to the pads where they now rest. The turnbuckle screws equally into each end when turned from the center nut, so dont just spin the end on or off, make sure the center nut is equal to both ends.

Now set your cav rod stop and tighten it down against the support plate. Now you can tighten the springs using a ratcheting style tye down leaving the final adjusting screws totally extended. (this way you can fine tune them later if needed) The more you can pull them now the less fine tuning you need. tighten the clamp bar real good. Now you have your neutral STOP set point. Your cav rod is now loaded, meaning its trying to pull the plate upwards but it is up against the neutral stop.

At this point you adjust the plate:
Using the 4' level off the bottom of the boat as a plane to measure from, starting from the left side adjust each turnbuckle so it lifts the plate 1/8" off the level all the way across. The last turnbuckle on the right side will be set at level or "0". The right side is where the boat torques on acceleration so thats why that end stays level to counter the effect. Try that out as your first set and it should be fine to get going with. You dont want your plate dragging when your up on plane and moving along. the 1/8" up is usually enough to suit most boats and why you should never need to use that up pedal. Just remember its NOT your friend unless a BIG cruiser wake is coming at you. But usually a blip of the GO pedal will get you over that.

Check to make sure EVERYTHING is tight, pins and clips are all on, etc. Its a good practice to check this whole assembly everytime you go out... things loosen up on flats, this is one thing you dont want coming apart!